AC-DC hybrid distribution network and control test method based on flexible multi-state switch

Abstract

The invention relates to an AC-DC hybrid distribution network based on flexible multi-state switches, the distribution network includes N AC power supply networks, where N is an integer greater than or equal to 2; each AC power supply network includes at least one pivot node , at least one terminal node and at least two branch nodes, the power distribution network further includes at least N flexible multi-state switches, the AC terminals of the flexible multi-state switches are connected to the AC power grid, which can realize AC and DC voltage conversion, and the DC port leads out; The invention also relates to a control test method including the above distribution network, which can realize active power balance, stabilize the system frequency and voltage, and improve the reliability of the distribution network.

Description

technical field [0001] The invention relates to an AC / DC hybrid distribution network and a control test method based on a flexible multi-state switch, and belongs to the technical field of flexible AC / DC distribution networks. Background technique [0002] Soft Normally Open Point (SNOP) is a new type of controllable power electronic device. Flexible multi-state switches can replace segment switches and tie switches in traditional distribution networks. In addition to the ability to turn off and on, the flexible multi-state switch also has functions such as active / reactive power control, unbalanced power regulation, and harmonic blocking. The AC-AC switch in this paper focuses on the topology structure and control method of the flexible multi-state switch itself, as well as its configuration method in the DC transmission network, only limited to the power electronic equipment level and the application method and configuration method of the equipment, no The connotation of ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the present invention proposes an AC-DC hybrid distribution network and a control test method based on flexible multi-state switches. The flexible multi-state switch is understood as a switch with controllable interconnection of electric energy, breaking away from the traditional AC-DC AC switch concept, and integrate it into the existing AC distribution network system, put forward a variety of typical application methods, form an intelligent AC-DC hybrid distribution network, solve the problem of uneven distribution of power flow, unstable frequency, and active power in the traditional AC power grid system Problems of power imbalance, AC voltage fluctuation and low terminal voltage

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